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Related Experiment Videos

Flow cytometric analysis of normal B lymphoid development.

M R Loken1, V O Shah, Z Hollander

  • 1Becton Dickinson Monoclonal Center, Mountain View, Calif.

Pathology and Immunopathology Research
|January 1, 1988
PubMed
Summary
This summary is machine-generated.

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This study models B lymphocyte development by tracking cell surface antigen changes, revealing discrete maturational stages. Understanding normal marrow development aids in assessing chemotherapy injury and identifying developmental blocks.

Area of Science:

  • Immunology
  • Cell Biology
  • Hematopoiesis

Background:

  • B lymphocyte development involves sequential acquisition of cell surface antigens.
  • Understanding these antigen expression patterns is crucial for modeling B cell maturation.
  • Normal bone marrow cellular composition is essential for identifying deviations.

Purpose of the Study:

  • To develop a model for sequential antigen acquisition during B lymphocyte development.
  • To characterize discrete stages of B cell maturation based on cell surface markers.
  • To establish a baseline for assessing bone marrow injury and developmental abnormalities.

Main Methods:

  • Flow cytometry analysis of bone marrow cells.
  • Identification and tracking of cell surface antigen expression (CD34, HLA-DR, CD19, CD10, TdT, CD45, HLA-DP, CD20, HLA-DQ, sIgM, CD21, CD22).

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  • Inference of developmental stages based on antigen profiles.

    • Main Results:

    • B cell development proceeds through discrete stages characterized by specific antigen expression patterns.
    • Immature B cells express CD34 and HLA-DR; early B lineage cells are CD19+, bright CD10+, and CD34+.
    • Maturation involves loss of CD34 and TdT, changes in HLA-DR, CD45, and CD10 density, and acquisition of CD20, HLA-DQ, sIgM, CD21, and CD22.

    Conclusions:

    • B lymphocyte development is a highly controlled process with coordinated antigen acquisition, suggesting discrete maturational stages.
    • This model aids in identifying cytotoxic injury from chemotherapy and radiotherapy by quantifying deviations from normal marrow composition.
    • Understanding normal hematopoiesis can help identify maturational blocks in hypoplastic marrow states and inform therapeutic strategies.